She will leave the institution this summer to become president of Columbia University.
Karen Thompson has also taken the role as interim faculty associate dean, following the departure of Jean-Francois Coget.
She takes up the research leadership post on May 2.
The UCLA professor will join the Long Island-based university next summer.
The Princeton economist will serve as president-elect through 2023 and as president in 2024.
Elga Bartsch takes up the post of director general for economic policy at the federal government department.
He takes up the role following the sudden departure of Marta Wosinska in February.
The Chicago Booth professor will begin work at the reserve bank in January.
He started work in the new research leadership role on Dec. 1.
The agricultural economist leads the university’s student commodity investing program.